traefik-lb's Introduction

Traefik LoadBalancer

This project sets up a Traefik load balancer in order to serve other projects through it.

Load balancer: https://traefik.josep.co

Run: make to see available Makefile targets.

Available targets:

  docker/restart                      Restart base stack resources
  docker/start                        Start base stack resources
  docker/stop                         Stop base stack resources
  ...
  start                               Start base stack resources. Alias for: docker/start
  stop                                Stop base stack resources. Alias for: docker/stop

Before start

Generate SSL certificates

make ssl/josep

Hosts file

You need to add an entry for the Traefik home page and then as many entries as projects that you have, each with its own subdomain. Like in the second line.

127.0.0.1 traefik.josep.co
127.0.0.1 myproject.josep.co

Run

make start

Configure other projects to be served through the load balancer

Having a project with name: my-flask-app that is served through port 5000.

Add it to the hosts file

127.0.0.1 traefik.josep.co
127.0.0.1 my-flask-app.josep.co

Importing and connecting from the other projects

Example of docker-compose. Pay attention especially to the following sections:

lb_net network so that they are in the same local network.
Traefik labels to make the service discoverable by Traefik and add the configuration.

Example of docker-compose

version: "3.9"
services:
  web:
    build: .
    env_file:
      - .env
    ports:
      - "6000:5000"
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.my-flask-app.entrypoints=websecure"
      - "traefik.http.routers.my-flask-app.tls=true"
      - "traefik.http.routers.my-flask-app.rule=Host(`my-flask-app.josep.co`)"
      - "traefik.http.routers.my-flask-app.service=my-flask-app"
      - "traefik.http.services.my-flask-app.loadbalancer.server.port=5000"
    networks:
      - lb_net

networks:
  lb_net:
    external: true